How much force is needed to accelerate a bicycle and rider with a total mass of 80 kg at a rate of 2.0 m/s2? a.20 n b.160 n c.320 n d.40 n

See the attachment and solve question 5th

In a particular chemical reaction, the energy of the reactants is 30 kj and the energy of the products is 5 kj. 
 the maximum energy of the system is 40 kj. sketch a potential energy diagram for this reaction. make sure to label the energy of the reactants, the energy of the products, the activation energy, and the enthalpy change for the reaction.

The is a pea sized structure in the brain that is involved in many aspects of motivation, including sex, aggression, and hunger